You need to consider the following complex number `z = x + i*y` and you need to replace it in the given equation, such that:
`(x + i*y)^2 = 2i => x^2 + 2i*x*y + (i^2*y^2) = 2i`
Replacing `-1` for ` i^2` yields:
`x^2 - y^2 + 2i*x*y = 2i`
You need to equate the real parts both...
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